code: def p_explicit_scalar_col(p):
      """scalar_col : SCALAR_PREFIX scalar_key"""
      p[0] = Scalar(p[2])
  
imports: import yaml
  from guild import _yacc
  from .None import Select, Scalar, Attr, Flag
  from .None import ParseError
  from .None import qlex
label_desc: Use image node_id 9 for calling a global function with example usage: p_explicit_scalar_col(p) without return types